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The C-Band All-Sky Survey (C-BASS) has observed the Galaxy at 4.76GHz with anangular resolution of $0.73^\circ$ full-width half-maximum, and detectedGalactic synchrotron emission with high signal-to-noise ratio over the entirenorthern sky ($\delta > -15^{\circ}$). We present the results of a spatialcorrelation analysis of Galactic foregrounds at mid-to-high ($b > 10^\circ$)Galactic latitudes using a preliminary version of the C-BASS intensity map. Wejointly fit for synchrotron, dust, and free-free components between $20$ and$1000$GHz and look for differences in the Galactic synchrotron spectrum, andthe emissivity of anomalous microwave emission (AME) when using either theC-BASS map or the 408MHz all-sky map to trace synchrotron emission. We findmarginal evidence for a steepening ($\left<\Delta\beta\right> = -0.06\pm0.02$)of the Galactic synchrotron spectrum at high frequencies resulting in a meanspectral index of $\left<\beta\right> = -3.10\pm0.02$ over $4.76-22.8$GHz.Further, we find that the synchrotron emission can be well modelled by a singlepower-law up to a few tens of GHz. Due to this, we find that the AME emissivityis not sensitive to changing the synchrotron tracer from the 408MHz map to the4.76GHz map. We interpret this as strong evidence for the origin of AME beingspinning dust emission.

The C-Band All-Sky Survey (C-BASS): Template Fitting of Diffuse Galactic Microwave Emission in the Northern Sky